// SPDX-License-Identifier: GPL-3.0-or-later
// Copyright (c) 2025 XujueKing <leadbrand@me.com>

// SuperVM 2.0 - Stealth Address Implementation
// 架构师: KING XU (CHINA)
// Phase 2.2.2: Stealth Addresses (Week 13-16)
//
// 实现一次性地址生成,保护接收方隐私

use crate::privacy::types::*;
use anyhow::Result;

/// Stealth Address Generator
/// 用于生成一次性接收地址
pub struct StealthAddressGenerator {
    // TODO: Phase 2.2.2 - 添加 ECDH 密钥交换
}

impl StealthAddressGenerator {
    /// 创建新的生成器
    pub fn new() -> Self {
        todo!("Phase 2.2.2: Implement stealth address generator")
    }
    
    /// 生成隐形地址
    /// 
    /// # 参数
    /// - `receiver_spend_public`: 接收方的花费公钥
    /// - `receiver_view_public`: 接收方的查看公钥
    /// - `tx_secret`: 交易私钥 (随机生成)
    /// 
    /// # 返回
    /// 隐形地址和交易公钥
    pub fn generate(
        &self,
        _receiver_spend_public: &PublicKey,
        _receiver_view_public: &PublicKey,
        _tx_secret: &SecretKey,
    ) -> Result<StealthAddress> {
        todo!("Phase 2.2.2: Implement stealth address generation")
    }
}

/// Stealth Address Scanner
/// 用于扫描区块寻找属于自己的交易
pub struct StealthAddressScanner {
    // TODO: Phase 2.2.2 - 添加扫描逻辑
}

impl StealthAddressScanner {
    /// 创建新的扫描器
    pub fn new(_wallet_keys: &WalletKeys) -> Self {
        todo!("Phase 2.2.2: Implement stealth address scanner")
    }
    
    /// 扫描交易输出,检查是否属于自己
    /// 
    /// # 参数
    /// - `output`: 交易输出
    /// 
    /// # 返回
    /// 如果属于自己,返回用于花费的私钥
    pub fn scan_output(&self, _output: &PrivacyOutput) -> Result<Option<SecretKey>> {
        todo!("Phase 2.2.2: Implement output scanning")
    }
    
    /// 批量扫描多个输出
    pub fn scan_outputs(&self, _outputs: &[PrivacyOutput]) -> Result<Vec<Option<SecretKey>>> {
        todo!("Phase 2.2.2: Implement batch scanning")
    }
}

/// 生成查看密钥对 (用于扫描)
pub fn generate_view_keypair() -> Result<(SecretKey, PublicKey)> {
    todo!("Phase 2.2.2: Implement view keypair generation")
}

/// 生成花费密钥对 (用于签名)
pub fn generate_spend_keypair() -> Result<(SecretKey, PublicKey)> {
    todo!("Phase 2.2.2: Implement spend keypair generation")
}

/// 生成完整的钱包密钥
pub fn generate_wallet_keys() -> Result<WalletKeys> {
    todo!("Phase 2.2.2: Implement wallet key generation")
}

#[cfg(test)]
mod tests {
    use super::*;
    
    #[test]
    #[should_panic(expected = "not yet implemented")]
    fn test_stealth_generator_placeholder() {
        let _generator = StealthAddressGenerator::new();
    }
    
    #[test]
    #[should_panic(expected = "not yet implemented")]
    fn test_wallet_keys_placeholder() {
        let _ = generate_wallet_keys();
    }
}
